摘要
采用数值模拟与试验验证相结合的方法对激光辅助电弧复合增材制造过程中的应力以及变形进行模拟与分析。分析了激光辅助电弧复合增材制造的应力场演变规律,并在此基础上研究了堆积方式、激光功率对残余应力以及变形的影响。结果表明,成形件残余应力整体上呈现拉应力,中间部分为拉应力,靠近基板处为压应力。交错式堆积路径下成形件残余应力小于同向式,交错式堆积路径下成形件变形较大。成形件的残余应力以及变形随着激光功率的增大而增大,900 W功率时成形件应力以及变形最小。研究成果对激光辅助电弧复合增材制造工艺参数的选择提供了一定的基础数据。
The combination of numerical simulation and experimental verification was used to simulate and analyze the stress and deformation during the laser assisted arc additive manufacturing process. The evolution law of stress field in laser assisted arc additive manufacturing was studied. Based on this, the effects of stacking mode and laser power on residual stress and deformation were studied. The results show that the residual stress of the formed part is tensile stress as a whole, the middle part is the tensile stress in the additive direction, the part closed to the substrate is compressive stress. The residual stress of the part under the staggered stacking path is smaller than that of the same direction, and the deformation of the formed part under the staggered stacking path is large. The residual stress and deformation of the formed part increase with the increase of the laser power, and the stress and deformation of the formed part are minimal under 900 W power. The research result provides some essential data for the selection of laser-arc composite additive manufacturing process parameters.
作者
刘国昌
刘双宇
侯宇航
LIU Guochang;LIU Shuangyu;HOU Yuhang(College of Mechanical and Electric Engineering,Changchun University of Science and Technology,Changchun 130022,China;Primary Flight Training Base of Aviation University Air Force,Changchun 130022,China)
出处
《热加工工艺》
北大核心
2021年第15期106-111,共6页
Hot Working Technology
关键词
激光-电弧热源
增材制造
数值模拟
残余应力
工艺参数
laser-arc hybrid heat source
additive manufacturing
numerical simulation
residual stress
process parameters
